i) Brilliant, stunning
ii) Sexy, Very Attractive
iii) A Sexual Position performed by placing your lover's head under water, then holding a baseball bat over his/her head to keep them from coming back to the surface while you fuck them.

i) "That Fiat you bought off Hank was Hot Costner"
ii) "Jaysus that Hawko one with the big jabs is a bit of Hot Costner"
iii) "After we stalled down the BacBar we went on the beach and I Hot Costner-ed Lucy O'D."